Question

Explain different methods to reduce friction.​

Answer 1

Polishing: If we polish a surface, it becomes smooth and friction is reduced. Through polishing, unevenness of the surfaces is reduced. ... The use of ball bearing converts sliding friction into rolling friction. Separation of surfaces by air: Another way of reducing friction is to separate the surfaces by air.

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Answer 2

Answer:

To reduce friction following methods are commonly used:

1.Polishing: If we polish a surface, it becomes smooth and friction is reduced. Through polishing, unevenness of the surfaces is reduced.

2.Lubricating: By applying lubricantsto surfaces, friction is reduced. When we apply lubricant to surfaces, a thin layer of lubricant is formed over there and moving surfaces do not directly rub against each other.

3.Using ball bearings: This way of reducing friction involves the principle that an object is rolled instead of sliding. The use of ball bearing converts sliding friction into rolling friction.

4.Separation of surfaces by air: Another way of reducing friction is to separate the surfaces by air. This is how, a hovercraft works. A hovercraft moves on a layer of air between its hull and the water. The layer of air reduces friction allowing the hovercraft to move easily.

5.Giving a streamlined shape: Boats, cars, planes and rockets are streamlined to reduce friction with water or air.

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